Part Details | EXTERNALLY RELIEVED BODY SCREW
5305-01-237-2788 An externally threaded fastener whose threaded portion is of one nominal diameter, and whose unthreaded portion has been machined or ground in one or more places or over its entire length to a maximum diameter less than the minimum pitch diameter of the thread (excludes undercut for thread relief). It is No. 0 (0.060 IN.) (1.5 mm) or larger, and is designed to be held or driven with either a wrench or inserted driver (excluding internal socket and multiple spline types) or both in sizes below No. 10 (0.190 IN.) (5 mm) and larger sizes must have a head designed for any type inserted driver (excluding internal socket and multiple spline types) but may also be designed for external wrenching. A locking feature may be incorporated in the design of the head or threads. See also BOLT, EXTERNALLY RELIEVED BODY and BOLT, INTERNAL WRENCHING.
Alternate Parts: 13080145, 13080145, 5305-01-237-2788, 01-237-2788, 5305012372788, 012372788
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 53 | JUL 29, 1986 | 01-237-2788 | 01852 ( SCREW, EXTERNALLY RELIEVED BODY ) |
REFERENCE DRAWINGS & PICTURES
DISHED HEXAGON
HEXAGON
Cross Reference | NSN 5305-01-237-2788
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 13080145 | 04939 | LOCKHEED MARTIN CORPORATIONDBA LOCKHEED MARTIN |
| 13080145 | 58260 | PROGRAM MANAGER ADVANCED ATTACKHELICOPTER BARCOM AMCPM-AAH |
Technical Data | NSN 5305-01-237-2788
| Characteristic | Specifications |
|---|---|
| THREAD SERIES DESIGNATOR | UNRF |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| THREAD QUANTITY PER INCH | 28 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.295 INCHES MINIMUM AND 0.300 INCHES MAXIMUM |
| FASTENER LENGTH | 0.687 INCHES NOMINAL |
| MINIMUM TENSILE STRENGTH | 80000 POUNDS PER SQUARE INCH |
| HEAD STYLE | 2 DISHED HEXAGON |
| HEAD DIAMETER | 0.419 INCHES MINIMUM AND 0.437 INCHES MAXIMUM |
| HEAD HEIGHT | 0.122 INCHES MINIMUM AND 0.132 INCHES MAXIMUM |
| INTERNAL DRIVE STYLE | HEXAGON |
| WIDTH ACROSS FLATS | 0.1562 INCHES NOMINAL |
| EXTERNALLY RELIEVED BODY DIAMETER QUANTITY | 1 |
| FIRST DIAMETER FROM HEAD | 0.185 INCHES NOMINAL |
| DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER | 0.387 INCHES MINIMUM AND 0.392 INCHES MAXIMUM |